Support optimistic Create and Write operations on the SimpleCache.

net/disk_cache/backend_unittest.cc

Index: net/disk_cache/backend_unittest.cc
diff --git a/net/disk_cache/backend_unittest.cc b/net/disk_cache/backend_unittest.cc
index 275f1a96a3d34b4c688143c06fddcb249556baf8..605c6f453666542c1f44a9293bb98f0ee53c8a96 100644
--- a/net/disk_cache/backend_unittest.cc
+++ b/net/disk_cache/backend_unittest.cc
@@ -2899,6 +2899,13 @@ TEST_F(DiskCacheBackendTest, SimpleCacheOpenMissingFile) {
   entry->Close();
   entry = NULL;
 
+  // To make sure the file creation completed we need to call open again so that
+  // we block until it actually created the files.
+  ASSERT_EQ(net::OK, OpenEntry(key, &entry));
+  ASSERT_TRUE(entry != NULL);
+  entry->Close();
+  entry = NULL;
+
   // Delete one of the files in the entry.
   base::FilePath to_delete_file = cache_path_.AppendASCII(
       disk_cache::simple_util::GetFilenameFromKeyAndIndex(key, 0));
@@ -2930,6 +2937,13 @@ TEST_F(DiskCacheBackendTest, SimpleCacheOpenBadFile) {
   entry->Close();
   entry = NULL;
 
+  // To make sure the file creation completed we need to call open again so that
+  // we block until it actually created the files.
+  ASSERT_EQ(net::OK, OpenEntry(key, &entry));
+  ASSERT_NE(null, entry);
+  entry->Close();
+  entry = NULL;
+
   // Write an invalid header on stream 1.
   base::FilePath entry_file1_path = cache_path_.AppendASCII(
       disk_cache::simple_util::GetFilenameFromKeyAndIndex(key, 1));